Improvement in millstone-dressing machines



, 2 Sheets--Sheet 1. W'. P. UHLINGER.

l MillstoneDressing-Machines. N0.155,052. Patented Sept. 15,1874.

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Attorneys 2Sheets--Sheet'2. W. F.1UHLINGER'.

i Millstune Dressing-Machines'. I /f No.155,052. r Patented sepx.15,1874.

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UNITED STATES Pirrniv'r GFFICF..

WILLIAM P. UHLINGER, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT MlLLSTNE-DRESSING MACHINES.

Specification forming part of Letters Patent No. 155,052, dated September` 15, 1874; application led August 22, 1874.

CAsr. B.

To all whom it may conce-rn:

Be it known that I, WM. P. UHLINGER, of Philadelphia, in the county lof Philadelphia and State of Pennsylvania, have invented a new and valuable Improvement in Machine for Cutting and Dressing Furrows in Millstones; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed'drawings,

making a part of this specication, and to thel letters and figures of referen ce marked thereon.

Figure 1 of the drawings is a representation of a cross-sectional view of my machine for cutting and dressing furrows in millstones. Fig. 2 is a side view, Fig. 3 is a top view, and Fig. 4 is a detail View, of the same. i

My invention has relation to mechanism for cutting and dressing the angular furrows of millstones; and consists in certain novel mechanism hereinafter explained, and which is designed to serve as an effective apparatus for the purpose mentioned.

Heretofore the deep angular furrows of grinding-millstones have been formed by the slow and laborious process of hammering with picks or chiselsl held in the hand or actu'- ated by machinery.

The object of my invention is to cut those furrows by means of a rotating cutting-disk, mounted in a suitable frame, and provided with diamonds, for cutting smoothlythe furrows, and leaving their edges or furrows sharp and finished, as I will now proceed to explain.

.In the annexed drawings, A l.A designate two parallel guideways, grooved into which is a carriage, B, which is allowed to receive a rectilinear reciprocating motion. The ways A A are connected together' vat their ends by cross-pieces, constituting a rectangular bedv frame. D designates the main driving-shaft, which may be driven by a belt or by a handcrank, and which is supported by two standards, G C. This shaft carries two bevel spur- -wheels, E El, one of which, E, communicates a slow rotary motion to a long master-screw, F, through the medium of spur-wheels a b and a worm, a'. The other wheel, E1, engages up to its work.

with a bevel-wheel, E2, on the upper end of a vertical shaft, c, turning in a bearing, c', and carrying a spur-wheel, G, on its lower end. The wheel G, which should have a concave periphery, engages with a wheel, H, which should have a convex periphery, and which is keyed on a cutter carrying shaft, I. This shaft I is supported by bearings d d on the face of a segment, J, which is pivoted at t' to a standard, B', on the carriage B, and made adjustable about said pivot by means of a clamp, e, and slot e. The peripheries of the wheels G and H and the slot e' are concentric to the pivot c', so that shaft I can be inclined either to the right or the left without disengaging the teeth of said wheels. The shaft I is vertically adjustable, to properly adapt the cutter K to the depth of furrow'to be dressed; and this shaft is adjustable about the pivot i, for the purpose of adapting the cutter K to the different inclinations of the bottoms of the furrows.

'Ihe cutter K is represented in the form of a disk, but it may be4 a segment or an arm; and into the periphery and bottom of this cutter-head I secure a suitable number of cuttingdiamonds, p, which perform the dressing operation.

L designates a half-nut, which is formed on one arm of a lever, L', and adapted to engage with the threads on the master-screw F. The other arm of the lever Ll is acted on by a spring, S, and has pivoted to it a trip, g.

When this trip g is supported upon a rest, h, the half-nut L will be engaged with the master-screw, and the rotation of this screw will move the carriage B, and feed the cutter When the cutter reaches the eye of the millstone, or end of furrow, a iinger, k, on one of the ways A will strike the trip g, throw it off of its rest h, and allow the spring S to disengage the half-nut L from the masterscrew F, thus stopping the further progress of the carriage, and allowing the same to be quickly moved back by hand, to commence another operation of cutting.

I should have previously stated that the wheel E slides on the shaft D, but turns with it; and this Wheel is connected, by its grooved hub, to the standard B' on carriage B by means of a bracket, N.

Figs. 4 show right and left furrows. produced by adjusting the cutter-shaft about the pivot i.

What I claim as new, and desire to secure by Letters Patent, is-

l. In a machine for cutting and dressing furrows in millstones, the rotary cutting-disk, segment, or arm K, provided with diamonds, and applied to adjustable rotating shaft I on a reciprocating carriage, substantially as described.

2. The cutter-carrying shaft I, applied to a 

